1. BM/DPB/MAPS/1 Reference (shelfmark): BM/DPB/MAPS/1 Title: Official Letters Collection Area: Corporate Archives Languages: English Date Range: 1857-1909 Extent: 9 volumes
2. BM/DPB/MAPS/2 Reference (shelfmark): BM/DPB/MAPS/2 Title: Reports and Minutes Collection Area: Corporate Archives Languages: English Date Range: 1865-1909 Extent: 5 volumes
3. BM/DPB/MAPS/3 Reference (shelfmark): BM/DPB/MAPS/3 Title: Invoices for Purchases Collection Area: Corporate Archives Languages: English Date Range: 1867-1910 Extent: 3 volumes